﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class student
    {
        public abstract class Student 
        {
            public int id;
            private readonly string name = "海底捞";
            internal static int age = 2;
            protected string major = "修指甲";
        }

        public sealed class Student02
        {
          public readonly string name = "饿了么";
          internal static int age = 3;
        }
        public sealed class Student03
        {
            public int id;
            private static readonly string name = "海底诱惑";
            internal static int age = 4;
        }
        internal abstract class Teacher
        {
            public int id;
            private readonly string name = "美团";
            internal static int age = 5;
            protected string major = "做指甲";
        }
        internal sealed class Teacher02
        {
            public int id;
            private readonly string name = "朴朴";
            internal static int age = 6;
        }
    }
}
